We describe the Arcminute Cosmology Bolometer Array Receiver
(ACBAR) which is a 16 pixel, 240mK multifrequency bolometer
array for measuring primary and secondary anisotropies in
the CMB at millimeter wavelengths. ACBAR observes from the
2m Viper telescope at the South Pole and has just concluded
its second year of CMB mapping observations. In this talk we
will discuss the instrument design and performance as well
as preliminary results from a blind survey for massive
clusters of galaxies using the SZ effect.

ACBAR is funded by the Center for Astrophysical Research in
Antarctica (CARA), an NSF Science and Technology Center.

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